44128993 has 4 divisors (see below), whose sum is σ = 44224768. Its totient is φ = 44033220.

The previous prime is 44128979. The next prime is 44129003. The reversal of 44128993 is 39982144.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44128993 - 2¹³ = 44120801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44128493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47193 + ... + 48118.

It is an arithmetic number, because the mean of its divisors is an integer number (11056192).

Almost surely, 2^44128993 is an apocalyptic number.

It is an amenable number.

44128993 is a deficient number, since it is larger than the sum of its proper divisors (95775).

44128993 is an equidigital number, since it uses as much as digits as its factorization.

44128993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95774.

The product of its digits is 62208, while the sum is 40.

The square root of 44128993 is about 6642.9656780688. The cubic root of 44128993 is about 353.3794895401.

The spelling of 44128993 in words is "forty-four million, one hundred twenty-eight thousand, nine hundred ninety-three".